The Secret File is a compilation of photographs that have been circulated in the internet through viral marketing. It seems that the photos emerged from secret files of governments and agencies from around the world. They have been compiled here not only for pleasure and enjoyment, but to makes u...

A mysterious and intense X-ray source near the black hole shines onto the surface layers of the accretion disk, causing iron atoms to radiate characteristic emission -- what astronomers call the iron K line -- at about 6,000 to 7,000 electron volts. The inner part of the disk is orbiting the black h...

Dr Tony Padilla on some recent work he has been doing on the ultimate faith of the universe.

This is a full-resolution version of the NASA Curiosity rover descent to Mars, taken by the MARDI descent imager. As of August 20, all but a dozen 1600x1200 frames have been uploaded from the rover, and those missing were interpolated using thumbnail data. The result was applied a heavy noise reduct...

A tour of Quito Ecuador in South America. We visited the Middle of the World and Museum. The country was aptly named after the equator when Finnish scientists in the 1800s declared it the prime place on Earth to measure the equator’s bulge. Thanks to this, Mount Chimborazo (6310m) in the country’s

50 years ago, NASA’s Apollo 11 mission changed our world and ideas of what is possible by successfully landing humans on the surface of the moon⁠—and bringing them home safely⁠—for the first time in history. Today’s video Doodle celebrates this moment of human achievement by taking us through the jo

How big can they get? What's the largest so far detected? Where does an 18 billion solar mass black hole hide? We've never seen them directly, yet we know they are there. Lurking within dense star clusters or wandering the dust lanes of the galaxy. Where they prey on stars. Or swallow planets whole....

From 230 miles overhead, International Space Station external and crew-tended cameras captured video of the wildfires burning in central Texas to the southeast of the capitol of Austin at 12:07 p.m. Eastern time on Sept. 6, 2011. The video was accompanied by comments on the wildfires by Expedition 2...

Mars is a cold and barren desert today, but scientists think that in the ancient past it was warm and wet. The loss of the early Martian atmosphere may have led to this dramatic change, and one of the prime suspects is the solar wind. Unlike Earth, Mars lacks a global magnetic field to deflect the s

The robot lander Philae has sent back to Earth the first image taken on the surface of a comet more than 500 million kilometers away.